The Influence of New Silicate Cement Mineral Trioxide Aggregate (MTA Repair HP) on Metalloproteinase MMP-2 and MMP-9 Expression in Cultured THP-1 Macrophages.

Katarzyna Barczak,Dariusz Chlubek,Mariusz Lipski,Jadwiga Buczkowska-Radlińska,Irena Baranowska-Bosiacka,Mirona Palczewska-Komsa

doi:10.3390/ijms22010295

Katarzyna Barczak, Dariusz Chlubek + Show 4 more

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https://doi.org/10.3390/ijms22010295

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Abstract

The aim of the present study was to investigate the new silicate cement mineral trioxide aggregate (MTA Repair HP) with respect to its effect on the inflammation process involving the tooth and periodontal tissues. The composition of MTA Repair HP was supplemented with plasticizer agents which can have a negative effect on the modulation of tooth inflammation. The silicate-based material in question is widely used in regeneration of the pulp-dentin complex, treatment of perforations of various locations in the tooth, as well as in surgical treatment of the complications of periapical tissue. The improved bioceramic restorative cement can affect the expression of metalloproteinases MMP-2 and MMP-9 in monocytes/macrophages involved in modulation of inflammation and regenerative processes of the tooth and periodontal tissues. The novel aspect of the present study lies in the application of the model of THP-1 monocyte/macrophage and applying the biomaterial in direct contact with the cells. Hence, it provides a representation of clinical conditions with respect to regenerative pulp and periodontal treatment with the use of MTA Repair HP. A lack of macrophage activation (as measured with flow cytometry) was found. Moreover, the study identified a lack of expression stimulation of the studied metalloproteinases (with the use of Western blotting and fluorescent microscopy). Similarly, no increase in MMP-2 and MMP-9 concentration was found (measured by ELISA method) in vitro when incubated with MTA Repair HP. Based on the results it can be concluded that new MTA Repair HP does not increase the inflammatory response in monocytes/macrophages associated with the activity of the described enzymes. It can also be speculated that they do not affect the process of dentin regeneration in which MMP-2 and MMP-9 play significant roles.

Highlights

There is an exponential increase in the clinical uses of bioceramics due to a wide range of applicability of the materials in restorative dentistry and endodontics
The resultsinofthe the presence analysis conducted using flow indicated that monocytes incubated of mineral trioxide aggregate (MTA) Repair
Activation of THP-1 monocytes by significantly following 48 h in cells treated with phorbol 12-myristate 13-acetate (PMA)

Summary

Introduction

There is an exponential increase in the clinical uses of bioceramics due to a wide range of applicability of the materials in restorative dentistry and endodontics. Numerous reports and studies confirm that with respect to various clinical procedures, MTA is considered as the golden standard material [1,2]. With respect to its biocompatibility, bioactivity and hydrophilicity, as well as radiodensity, sealing ability and low solubility, MTA shows several desirable properties. When in contact with moisture, the chief component of MTA, i.e., calcium oxide, converts into calcium hydroxide, well-known to many clinicians. This results in a high pH microenvironment which was shown to have desirable antibacterial effects. Unlike calcium hydroxide, this material shows very low solubility and is known to maintain its physical integrity after placement [3]. This, in turn, shows an inhibitory effect on the growth of microorganism and results in disinfection of dentin [4,5]

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